insufficiency (n.)

• arrears
• asymmetry
• baseness
• contrariety
• daintiness
• decline
• defalcation
• default
• defectiveness
• deficiency
• deficit
• delicacy
• delinquency
• difference
• diminutiveness
• disability
• disablement
• disequilibrium
• disparity
• disproportion
• disqualification
• exiguity
• failure
• fewness
• heterogeneity
• imbalance
• imbecility
• imperfection
• inability
• inadequacy
• inadmissibility
• incapability
• incapacity
• incompetence
• incompetency
• inefficiency
• ineptitude
• inequality
• inequity
• infancy
• inferiority
• injustice
• insignificance
• irregularity
• littleness
• maladroitness
• meagerness
• meanness
• mediocrity
• minority
• minuteness
• moderateness
• nonuniformity
• odds
• pettiness
• puniness
• scantiness
• shabbiness
• shortage
• shortcoming
• shortfall
• slightness
• slump
• smallness
• subnormality
• tininess
• triviality
• unacceptability
• unbalance
• underage
• undesirability
• unevenness
• unfitness
• unimportance
• unsatisfactoriness
• unskillfulness
• unsuitability
• vulgarity
• wardship